feat: implement email verification page

- Create /email/verify/[id] route with page and component
- Add share-id validation and 404 on invalid links
- Add bilingual translations (English/Croatian)
- Implement verification UI with success/error states
- Call verifyTenantEmail server action on button click

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

web-app/messages/en.json

@@ -415,6 +415,37 @@
       "content": "If you have any questions about these Terms, please contact us at <emailLink>support@rezije.app</emailLink>."
     }
   },
+  "email-verify-page": {
+    "title": "Verify Your Email Address",
+    "about": {
+      "title": "About Evidencija Režija",
+      "description": "Evidencija Režija is a utility bills tracking application that helps landlords manage their properties and notify tenants about rent and utility bills."
+    },
+    "why": {
+      "title": "Why did you receive this email?",
+      "description": "Your landlord has configured the application to send rent due and/or utility bills notifications to your email address. To start receiving these notifications, you need to verify your email address."
+    },
+    "what-happens": {
+      "title": "What happens after verification?",
+      "description": "After you verify your email address, you will receive notifications when rent is due and/or when utility bills are ready, depending on your landlord's configuration. Notifications are sent up to twice per month."
+    },
+    "opt-out": {
+      "title": "Don't want to receive emails?",
+      "description": "You can ignore this email if you don't want to receive notifications. You can also unsubscribe at any time using the link included in every notification email."
+    },
+    "button": {
+      "verify": "Verify Email Address",
+      "verifying": "Verifying..."
+    },
+    "success": {
+      "title": "Email Verified!",
+      "message": "Your email address has been successfully verified. You will now receive notifications from your landlord."
+    },
+    "error": {
+      "title": "Verification Failed",
+      "unknown": "An error occurred during verification. Please try again or contact your landlord."
+    }
+  },
   "privacy-policy-page": {
     "title": "Privacy Policy for the Utility Bill Tracking Web App",
     "meta": {